A group of 43 men aged 27-37 years were divided into two groups: 1) the active Testosterone Booster compound group and 2) an indistinguishable placebo group. All subjects consumed their test product every morning at breakfast for 12 consecutive days, and blood samples were taken before treatment, after 6 and 12 days of treatment, and 3 days after stopping treatment. All blood samples were drawn between 9:30-10:30 am, a time of day when serum oscillations of testosterone are at their minimum. Results showed that serum testosterone levels in the active group were significantly increased compared to those of the placebo group over the course of the study, wherein the active TestosteroneBooster compound led to a 42% increase in testosterone after 12 days of use. Interestingly, 3 days after the suspension of treatment, testosterone was still increase 1.22 fold compared to baseline in the treatment group, showing a lasting effect.

682% MEAN INCREASE IN SERUM LEVELS*In a recent, randomized, cross-over, double-blind clinical trial, men and women between 18 and 70 years of age were recruited. Subjects were scheduled for two testing sessions a week apart where, after an overnight fast, blood samples were drawn over a period of 120 minutes after consumption of either the proprietary Growth Factor-9 blend or placebo capsules. Neither the subjects nor the investigators knew at which session the subjects received the GF-9 blend and at which session they received the placebo. At the end of the study, the samples were tested for serum hormone levels, and the results were independently analyzed. The results: the GF-9 blend led to a 682% increase in serum hormone levels at 120 minutes, which was significant above and beyond placebo.*

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Disclaimer:
This scientific independent research is provided by Aisle7 and is for informational use only. GNC provides this information as a service but does not endorse it. Likewise, Aisle7 does not recommend or endorse any specific products.

Pyruvate for Sports & Fitness

Why Do Athletes Use It?*

Some athletes say that pyruvate helps them lose body fat and also helps boost metabolism and increase endurance.

What Do the Advocates Say?*

Pyruvate appears to promote weight loss by increasing the metabolic rate. There is good research based on human studies showing that pyruvate helps to promote weight loss in overweight people on low-fat diets.

Although pyruvate promotes weight loss, which is good for heart health, it is important to monitor cholesterol levels as it may reduce HDL ("good") cholesterol.

How Much Is Usually Taken by Athletes?

Three controlled studies of untrained individuals using a combination of 6 to 10 grams per day of pyruvate and an exercise program reported greater effects on weight loss and body fat compared with those taking a placebo with the exercise program.1, 2, 3 However, controlled studies of the effects of pyruvate supplementation on exercise performance have tested only trained athletes, and these athletes did not experience improvements from pyruvate supplementation. Seven grams per day did not improve aerobic exercise performance in cyclists,4 and an average of 15 grams per day did not improve anaerobic performance or body composition in football players.5

*Athletes and fitness advocates may claim benefits for this supplement based on their personal or professional experience. These are individual opinions and testimonials that may or may not be supported by controlled clinical studies or published scientific articles.

The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2016.

I started taking these supplements based on an advertisement in Men's Health and the many positive reviews.

It took about a month for the effects to be noticeable, but I have definitely found that I can lift more and am more defined. I also like how many of my aches and pains have been eliminated by my body healing itself faster.

Being over 45 is a real pain because I have to work out twice as hard for half the results, but this duo seems to level the playing field.

I'm 28 years old. Been working out since i was about 13 or 14. Took some time off in between. Usually i'll see/feel results with in the first few days and i haven't. I have been using as instructed for a little over a week with really no results that i wouldn't normally get from going go to the gym like normal. It's possible that i may be to young to get the full results of this product. I'll finish the cycle and post if changes occur.

I'm 42, work out at least 4 times a week, and take this product as recommended. After 30 days, the changes in my physique were noticeable as evidenced by a lot of compliments from my co-workers and regulars at the gym. The product truly does make a difference. I noticed a significant drop in energy and increased recovery time when off the product for 7 days while waiting for a re-order to arrive. This is now a staple part of my supplements. Worth the investment.

If you follow the instructions and take this on an empty stomach before bed you will be impressed with the results. I combined this with the Growth Factor 9 and was able to build muscle like never before. Highly recommended.